1

®

FN9054.1

ISL72991RH

Radiation Hardened Negative Low

Dropout Adjustable Voltage Regulator

The radiation hardened ISL72991RH is a low dropout

adjustable negative regulator with an output voltage range of

-2.25V to -26V. The device features a 1A output current

shutdown pin (SD) for easy on/off control.

The device incorporates unique circuitry that enables

precision performance over the -55°C to +125°C temperature

range and post-irradiation. Specifications include a reference

voltage of -1.25V +40mV/-50mV (max), line regulation of

±25mV (max), and load regulation of ±15mV (max).

Constructed with the Intersil dielectrically isolated Rad Hard

Silicon Gate (RSG) BiCMOS process, these devices are

immune to Single Event Latch-up and have been specifically

designed to provide highly reliable performance in harsh

radiation environments.

Specifications for Rad Hard QML devices are controlled

by the Defense Supply Center in Columbus (DSCC). The

SMD numbers listed here must be used when ordering.

Detailed Electrical Specifications for these devices are

contained in SMD 5962-02503. A ‘hotlink’ is provided on

the Intersil website for downloading.

Pinout

ISL72991RHF (FLATPACK CDFP3-F28)

TOP VIEW

Features

• Electrically Screened to DSCC SMD # 5962-02503

• QML Qualified per MIL-PRF-38535 Requirements

• Radiation Environment

- Total Dose (Max) . . . . . . . . . . . . . . . . . . . . 300krad(SI)

- Latch-Up Immune

• Line Regulation . . . . . . . . . . . . . . . . . . . . . . ±25mV (max)

• Load Regulation . . . . . . . . . . . . ±12mV (typ); ±15mV (max)

• Output Voltage Range . . . . . . . . . . . . . . . . -2.25V to -26V

• Dropout Voltage (100mA). . . . . . . . 0.2V (typ); 0.3V (max)

• Dropout Voltage (1A) . . . . . . . . . . . . . . . . . . . . . .1V (max)

• Minimum Load Current. . . . . . . . . . . . . . . . . . . . . . .3.0mA

• TTL Input-Level Shutdown (SD); Low = On

Applications

• Switching Power Supplies

• DC/DC Converters

• Motor Controllers

1

2

3

4

5

6

7

8

9

10

11

12

13

14

28

27

26

25

24

23

22

21

20

19

18

17

16

15

VIN

VIN

NC

NC

NC

NC

NC

NC

NC

NC

GND

ILIM

VOUT

VOUT

VIN

VIN

NC

NC

NC

NC

NC

NC

NC

NC

ADJ

SD

VOUT

VOUT

Ordering Information

ORDERING NUMBER

INTERNAL

MKT. NUMBER

TEMP. RANGE

(°C)

5962F0250301VXC

ISL72991RHVF

-55 to 125

5962F0250301QXC

ISL72991RHQF

-55 to 125

5962F0250301V9A

ISL72991RHVX

-55 to 125

ISL72991RHF/Proto

ISL72991RHF/Proto

-55 to 125

Data Sheet

June 2004

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

1-888-INTERSIL or 321-724-7143

Copyright © Intersil Americas Inc. 2002, 2004. All Rights Reserved.

All other trademarks mentioned are the property of their respective owners.